McDonald’s is known worldwide for its ability to provide a quality product in a
ID: 3317231 • Letter: M
Question
McDonald’s is known worldwide for its ability to provide a quality product in a timely manner. Below is a data set that represents the time that it takes to fill a late night burger crave measured in seconds.
137
242
156
312
215
335
216
147
253
217
323
219
1.Find the mean, median and mode for this data set.
2.Find the range, IQR and standard deviation for this data set.
3.Would it be unusual to find an order that took 60 seconds to fill? How do you know?
137
242
156
312
215
335
216
147
253
217
323
219
Explanation / Answer
Solution:
a) mean= 231
335, 323, 312, 253, 242, 219, 217, 216, 215, 156, 147, 137
median = 6.5th element= 218
there is no mode
b) range is 335-137 = 198
Population size:12
Lower quartile (xL): 170.75
Upper quartile (xU): 297.25
Interquartile range (xU-xL): 126.5
standard deviation= 66.595
c) 95% confidence interval is (188.69, 273.31)
so its ususal to find an order that took 60 seconds to fill.